WaterHard.uk

Water Hardness in DE21 Derby

Supplied by Severn Trent Water • Derbyshire, East Midlands

213 PPM 0 200 400
Hard
213
ppm (mg/L CaCO₃)
14.9°
Clark Degrees
11.9°
German Degrees (dH)
21.3°
French Degrees (fH)

Water Hardness in Derby (DE21)

The water in postcode district DE21 is classified as hard with a hardness level of 213 ppm (parts per million) calcium carbonate. This is 6 ppm above the UK national average of 207 ppm.

Your water is supplied by Severn Trent Water, which serves the East Midlands region. Severn Trent Water draws water from sources that naturally contain dissolved minerals, primarily calcium and magnesium compounds.

What Does Hard Water Mean for Your Home?

  • ! Significant limescale buildup in kettles, pipes and boilers
  • ! Soap scum on shower screens and taps
  • ! Higher energy bills from scale in heating elements
  • ! Dry skin and dull hair after washing
  • ! White residue on dishes and glassware

Solutions for Hard Water in Derby

At 213 ppm, you may benefit from a water softener or filter to reduce limescale and improve water quality.

View Solutions Water Softener Guide

Water2Buy W2B200 Water Softener

From ~£400

Best-value whole-house ion-exchange softener for UK homes. Eliminates limescale from pipes, boilers, and appliances. Digital metered regeneration — low salt use. 7-year warranty, suits 1–4 people.

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Philips AWP1775 Shower Filter

From ~£30

Instant improvement for skin and hair. Reduces chlorine and limescale at the showerhead — no plumbing needed. KDF filtration, cartridge lasts ~6 months. A great first step in a hard water area.

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BRITA Marella Water Filter Jug

From ~£20

UK's best-selling filter jug. Reduces limescale, chlorine, and metals for better-tasting tap water. Quick first step alongside a softener.

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How DE21 Compares

Area Hardness PPM
DE21 Derby
213 ppm
213 ppm
UK National Average
207 ppm
207 ppm

Nearby Areas

DE22
Derby
214 ppm
DE23
Derby
215 ppm

Frequently Asked Questions

What is the water hardness in DE21 Derby?
The water in DE21 Derby has a hardness level of 213 ppm (parts per million) calcium carbonate, classified as hard. This is 6 ppm above the UK national average of 207 ppm.
Which water company supplies DE21?
DE21 Derby is supplied by Severn Trent Water. Severn Trent Water serves the East Midlands region.
Is the water in DE21 safe to drink?
Yes. Hard water at 213 ppm is safe to drink. Water hardness affects taste and can cause limescale, but it is not a health risk. In fact, hard water contains beneficial minerals like calcium and magnesium.
How can I reduce water hardness in DE21?
For hard water at 213 ppm, a whole-house water softener is the most effective solution. You can also use a jug filter for drinking water, descaling products for appliances, and a shower filter for better skin and hair.
What does 213 ppm water hardness mean?
213 ppm means there are 213 parts per million of calcium carbonate dissolved in the water. This is equivalent to 14.9 Clark degrees, 11.9 German degrees, or 21.3 French degrees. Water above 180 ppm is generally considered hard.

Learn More

All postcodes in Derby Severn Trent Water coverage Hard water effects on your home Solutions for hard water

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